MacBook Air doesn't have a user-replaceable battery — We sort of understood it with iPods, and we grudgingly accepted it with the iPhone, but the MacBook Air has a sealed, non-user-replaceable battery, and that means we're suddenly a lot less in love. We're digging for details …

MacBook Air Hands-on — Here's our take on the MacBook Air. It's super light, super fragile, and super small. If you just tap the screen lightly, the whole thing closes because it's so light. The keyboard looks a little weird because it's black on the aluminum, but the keyboard feels great.

Sizing it up: MacBook Air vs. the rest — So just how thin and lightweight is the new 13.3-inch MacBook Air. We've pitted it against the 13.3-inch Dell XPS M1330, 13.3-inch Sony VAIO SZ, and Apple's own MacBook to see how it stacks up, literally. Not bad Stevie, not bad.

Hey, Steve — you broke the Internet — Thanks for all the great toys, Uncle Steve, but did you have to go and break the Internet? I and about 7,000 other people were all signed up to get Twitter updates from MacRumors, but I never saw a single one — and in fact the entire Twitter.com network …

Live from Macworld 2008: Steve Jobs keynote — Thanks for joining us for our live Macworld 2008 keynote coverage! We're in, so click on, all our real-time updates are posted just after the break. — Note: this time we're updating from bottom to top, with the latest updates below.

Breaking: Samwer Brothers Invest In Facebook — Serial German entrepreneurs Alexander, Marc and Oliver Samwer have invested in Facebook, we've heard from a very reliable source - presumably as part of Facebook's recent $15 billion valuation round with Microsoft. We are still trying to nail down the size of the investment.

Amazon.com is challenging French competition law — PARIS: The online retailer Amazon.com said Monday that it would pay €1,000 a day in fines, rather than comply with a court ruling upholding French limits on price discounts for books. — The company decided to pay …

First Rogue Cleaning Tool for Mac — We've just found the first Mac rogue application and it's called MacSweeper. — It claims to clean your Mac from compromising files and it will always find something to fix/clean but the only way to do so is to buy the program.